Which fascia forms the posterior boundary of the inguinal canal at the deep ring?

Which fascia forms the posterior boundary of the inguinal canal at the deep ring?

• A. Transversalis fascia
• B. External oblique aponeurosis
• C. Internal oblique
• D. Rectus sheath

Answer: (A)

The deep inguinal ring is an opening in the transversalis fascia, so that fascia forms the posterior boundary where the canal begins. The inguinal canal runs just above the inguinal ligament, with its anterior wall mainly the external oblique aponeurosis, and its roof formed by the fibers of the internal oblique and transversus abdominis. The rectus sheath isn’t involved in defining the canal’s posterior boundary at the deep ring. The transversalis fascia also gives rise to the internal spermatic fascia around the spermatic cord as it passes through the deep ring.

The deep inguinal ring is an opening in the transversalis fascia, so that fascia forms the posterior boundary where the canal begins. The inguinal canal runs just above the inguinal ligament, with its anterior wall mainly the external oblique aponeurosis, and its roof formed by the fibers of the internal oblique and transversus abdominis. The rectus sheath isn’t involved in defining the canal’s posterior boundary at the deep ring. The transversalis fascia also gives rise to the internal spermatic fascia around the spermatic cord as it passes through the deep ring.